Implement CLI

Signed-off-by: Cristian Le <cristian.le@mpsd.mpg.de>

src/cli.cpp

@@ -1,17 +1,39 @@
 #include <CLI/App.hpp>
 #include <CLI/Config.hpp>
 #include <CLI/Formatter.hpp>
+#include <fstream>
+
+#include "nlohmann/json-schema.hpp"
+
+using namespace nlohmann;
+using namespace nlohmann::json_schema;
 
 int main(int argc, char *argv[])
 {
+	std::ifstream schema_input;
+	std::ifstream object_input;
+
 	CLI::App app{"Json schema validator", "json-validator"};
 	// TODO: Move to a generated header file
 	app.set_version_flag("--version", "2.2.0");
+	app.add_option("schema", schema_input, "JSON schema of the object")
+	    ->check(CLI::ExistingFile);
+	app.add_option("object", "JSON object to validate")
+	    ->check(CLI::ExistingFile);
 
 	try {
 		app.parse(argc, argv);
 	} catch (const CLI::ParseError &e) {
 		return app.exit(e);
 	}
+
+	json schema{};
+	json object{};
+	if (!schema_input.good())
+		throw std::invalid_argument("could not read schema");
+	if (!object_input.good())
+		throw std::invalid_argument("could not read object");
+	schema_input >> schema;
+	object_input >> object;
 	return 0;
 }